Welcome to the forum!
Changing from propanolol to meoprolol could be the reason for the shaky hands. It will probably resolve once you adjust to the new medication. I used to take propanolol and it helped with my hand tremors.
I am not sure whose post you are referring to, but ejection fraction refers to the fraction (percentage) of blood pumped from the hearts' ventricles with each heartbeat. A normal EF is said to be 55-70% +/- 5% (reader interpretation).
I never heard of ejection factor before. I guess there are questions I should be asking my cardiologist.
I was refering to ?? I cannot remember his name but he was asking questions about thyroid and MVP and metoprolol, etc. Sounded simular to my problem.